Upright Hammer Shank Length

[Joe And Penny Goss]

Hi Terry.
Drill out the old hammer butt and use a some what shorter shank than what you may need to locate the best length. Do not glue either end unless you have extra hammers to work with. If the shank is too loose in either hole one can use fine copper winding from a universal bass string to make the fit tight until the sweet spot is found.
Joe Goss RPT
Mother Goose Tools
imatunr at srvinet.com
www.mothergoosetools.com
  ----- Original Message ----- 
  From: Farrell 
  To: pianotech at ptg.org 
  Sent: Monday, April 03, 2006 10:59 AM
  Subject: Upright Hammer Shank Length


  I'm installing a new action in an upright. I need to find the "sweet" spot up at C88 to determine how long to cut the shanks (determine strike point). Doing this on a grand piano is so easy by sliding the action in and out a bit and the hammer assembly can be glued nice and firm for good sound production. 

  Does anyone have any suggestions on how to do this on an upright? If you move the action, the regulation changes, and if you have the hammer mobile, I fear it is too loose to really get a good sound. How do you folks do make this determination?

  Terry Farrell
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